Spark-intensifier



K. R'- KOEHLER.

SPARK INTENSIFIER.

APPLICATION FILED NOV. 25. 1919.

1,388,348. Patented Aug. 23,1921.

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A TTORNE Y.

PATENT OFFICE.

KURT 1t, KOEHLEB, or MERRILL, WISCONSIN.

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Specification of Letters Patent. Patented Aug. 23, 1921.

Application filed November 25, 1919. Serial No. 340,528.

To all whom it may concern Be it known that I, KURT R. KOEHLER, acitizen of the United States, residing at Merrill, in the county ofLincoln and State of lVisconsin, have invented certain new and usefulImprovements in Spark-Intensifiers, of which the following is aspecification.

My invention consists in a new and useful improvement in sparkintensifiers for spark plugs, and provides an extremely simple, cheapand effectual attachment which may be applied to any of the well-knownforms of spark plugs to secure an intensified spark, by the provision ofa secondary spark gap. The device may be secured to the plug in the samemanner as the wire terminal is ordinarily attached, thus obviating thenecessity of any particular tool for its installation. The wire terminalis attached to the device in the same way that it is ordinarily attachedto the plug. Moreover, my device is so designed that the secondary sparkgap provided by the device may be closed by the adjustment of thedevice, thus obviating the necessity of removing the device,

when it is desired to dispense with the secondary spark gap. Experiencein the use of this device has shown that excellent ignition results maybe secured in spite of broken porcelains in the spark plugs, since theproduction of the secondary spark gap by the use of this device,intensifies the spark to such a degree as to overcome the defect in thelug.

l y device is embodied in the details of construction hereinafterpointed out, and the scope of my invention is fully set forth in thefollowing claims. r

In the drawings: 7

Figure 1 is a side view of a spark plug provided with my device.

Fig. 2 is a vertical transverse section on the line 22 Fig. 1.

Fig. 3 is an enlarged side view of a portion of the spark plug and thedevice in a different position from that shown in Fig. 1.

In the drawings:

A designates any well known form .of spark plug in which is theelectrode A provided with the threaded upper end A surrounded by thecollar A which provides a contact plate for the spark plug A. A nut A isadapted to be applied to the threaded end A The foregoing constructionconstitutes the binding post of the spark plug A. My improved device hasan insulated ring B,

which is provided with two oppositely disposed orifices'B and B Througheither of these orifices (B indicated in the drawings) the threaded endA may pass, and by the use of the nut A the ring B may be securelylooked upon the spark plug A. Through the other orifice, (B indicated inthe drawings) the combined electrode and binding post C is inserted, inaxial alinement with the electrode A. Within the ring B upon theelectrode C, there is mounted the lock nut C and upon the portion of theelectrode C without the ring B is mounted the second look nut C Betweenthe nut C andv the ring B, there is provided the washer C which servesas a contact plate for the reception of the terminal D of the conductorwire D.

From the foregoing description, it will be seen that the device may bemounted upon the spark plug A by means of the nut A, and the electrode Cmay be adjusted in relation to the upper end A of the electrode A toprovide any length of spark gap between the two electrodes. By the useof the nuts C and C the electrode C may be securely locked in positionupon the ring B and at the same time the terminal D may be secured inelectrical contact with the electrode C.

If it is desired to dispense with the secondary spark gap between theelectrodes A and C, the electrode C may be adjusted in the orifice B sothat it is brought into contact with the upper end A of the electrode Aas indicated in Fig. 3, thus securing the normal adjustment of theignition system without the necessity for the removal of the device fromthe spark plug A.

Having described my invention, what I claim is:

1.'In an attachment for spark plugs, an

insulated ring provided with two circular.

orifices, one of which is adapted to receive therethrough the bindingpost of a spark plug; a second binding post adapted to be insertedthrough the other orifice; a lock nut upon said spark plug binding postadapted to lock said ring upon said post; a lock nut upon said secondbinding post within the ring; and a second look nut upon said secondbinding post outside of the ring; the said lock nuts upon said secondbinding post adapted to lock said second binding post upon said ring.

2. In an attachment for spark plugs, an insulated ring adapted to belocked directly ltl upon the binding post of'a spark plug by said ring;and a contact plate between said means of the binding post locknut;athreadring, and said second lock nut and adapted ed electrode adaptedto be mounted in said to co-act with said second lock nut to form 10ring in axial alinement with said binding a second binding post. V postand adjustable in relation thereto; a In testimony whereof I afiix mysignature. look nut on said electrode within said ring; I a

a second look nut on said electrode outside KURT R. KOEHLER.

